my new truck has a 18 sh motor. the clutch went out on it. as i was fixing it i noticed the flywheel was loose. i am waiting for the new clutch shoes to come in the mail. is the flywheel supposed to be loose? no right? i am having another problem with my truck. when the motor got warm it stopped running and the fuel was pushed back into the fuel tank from the carb. do you think the loose flywheel and the broken clutch could have caused that, do you think that there could be something else wrong. i have the carb needles set to the factory settings. any info would be appreciated thankyou.